Method and apparatus for rolling tubes

Details Method and apparatus for rolling tubes Method and apparatus for rolling tubes

1986-08-13

1988-03-15

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Including plural sensors or sensor responsive to comparison...

72123, B21D 3906

Patent

active

047304731

ABSTRACT:
A method and apparatus for rolling tubes into tube plates, especially heat exchangers, with a tube roller. Prior to the rolling process, the desired holding expansion value is set, and during the rolling process the holding expansion is measured. When the preset expansion value is reached, the expansion is discontinued. The magnitude of the holding expansion is determined by ultrasonically measuring the changing thickness of the wall of the tube during the expansion. The apparatus includes a tube roller that is operated by a drive mechanism. Also provided is a roll controller that can be set to the desired holding expansion value. An ultrasonic measuring head is provided in the tube roller, and is connected with the roll controller.

REFERENCES:
patent: 3401547 (1968-09-01), Hall et al.
patent: 3404551 (1968-10-01), Spisak
patent: 3600613 (1971-08-01), Clark
patent: 3693387 (1972-09-01), Blackburn
patent: 4520672 (1985-06-01), Saint-Amour

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